In the year 1800, most people of the world simply walked, and rode horse - (or human) - drawn carriages at times. Bicycles had reached mass-marketing potential in the late 1700s, and were gaining ground in the early 1800s. Long-haul trains, likewise, had been already invented, but it was only in the 1800s that they became major modes of mass transportation. By the end of the century, a city wouldn't be complete without a slew of commuter lines crisscrossing it. The takeoff and evolution of automobiles, airplanes, spacecraft, and computers, in particular, would give people a new sense of themselves and humanity, and the incredible speed of innovation kept people expecting that tomorrow would always be more comfortable, convenient, and advanced than today, just as today was more advanced tha